A system of two blocks, of masses m1 and m2 , a smooth inclined plane, a light pulley and an inextensible light string, arranged as shown, is observed to be in equilibrium. If the normal reaction, due to the inclined plane, on the mass m1 equals that due to a mass M, on a horizontal surface, we would have
(1) M =\(\sqrt{m^2_1+m^2_2}\)
(2) M = \(\sqrt{m^2_1-m^2_2}\)
(3) M = (m1 sinα m2)
(4) M = (m1 cosα m2)